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The .500 Whisper (metric: 13x57mm B [4]) is the first of two 1/2 inch caliber rounds developed by J. D. Jones with a specific focus on the Thumper concept and subsonic use. Being based on the .378 Weatherby Magnum case, it is a belted and bottlenecked cartridge. Later, J. D. Jones went on to develop the similar .510 Whisper round.
The Whisper family of firearm cartridges is a group of wildcat cartridges developed in the early 1990s by J.D. Jones at SSK Industries. The Whisper family was developed as a line of accurate, multi-purpose cartridges using relatively heavy rifle bullets for a given caliber in subsonic loads.
Earlier J. D. Jones had already developed the similar .500 Whisper round, which has a roughly 0.4 inch (10 mm) longer belted bottlenecked case based on the .378 Weatherby Magnum. Despite the large bullet, this round is very quiet when using a suppressor due to the subsonic nature of the cartridge. When used with a very high ballistic ...
The .300 Whisper ( 7.82x34mm) is a CIP standard [1] cartridge in the Whisper family, a group of cartridges developed in the early 1990s by J.D. Jones of SSK Industries. It was developed as a multi-purpose cartridge, capable of utilizing relatively lightweight bullets at supersonic velocities as well as heavier bullets (200–250 grains) at ...
WSPR (pronounced "whisper") is an acronym for Weak Signal Propagation Reporter. It is a protocol, implemented in a computer program, used for weak- signal radio communication between amateur radio operators. The protocol was designed, and a program written initially, by Joe Taylor, K1JT. The software code is now open source and is developed by ...
The Lockheed L-1011 TriStar (pronounced "El-ten-eleven") [1] is an American medium-to-long-range, wide-body trijet airliner built by the Lockheed Corporation. It was the third wide-body airliner to enter commercial operations, after the Boeing 747 and the McDonnell Douglas DC-10. The airliner has a seating capacity of up to 400 passengers and a ...
Whisper numbers are the "unofficial and unpublished earnings per share (EPS) forecasts that circulate among professionals on Wall Street ... generally reserved for the favored (wealthy) clients of a brokerage." [1] According to Per Afrell, a former analyst at UBS Warburg, buy and sell side research analysts generally maintain a 20 plus page ...
22 Grendel (wildcat) aka 224 Grendel. .22 Nosler. .22 PPC. .22 ARC. .222 Remington (sometimes chambered in countries where ownership of military cartridges is illegal) .223 Remington – Original AR-15 cartridge: .223 cartridges may function in a 5.56×45mm rifle, however 5.56×45mm cartridges may produce excessive pressure in a .223 Rem rifle.